By the way, my jig (E. Wallin) does not work well, I think we need a modified sound card to make it work. I did not have time to continue the investigation but I will probably make my own jig. His jig does not seems to work well with a laptop sound card.

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Imagination is more important than knowledge. knowledge is limited, imagination encircles the world. Albert EinsteinFrankDIY's Audio Corner